They stopped at Blue Marsh Lake in nearby Leesport, Pa., where they parked for a bit before heading back.

"They definitely looked like two people in love," a source tells Us. "They were both laughing and smiling and just enjoying being together finally without worrying about being seen. They kissed and held hands a lot."

Earlier in the week, Jon, 32, told ABC News he loves Hailey more than Kate. He called Hailey - who is the daughter of the surgeon who performed Kate's 2006 tummy tuck - the "polar opposite" of his estranged wife.